Washington: Today - Clearing, breezy and cooler, high in the low 60s, low in the 30s. The chance of rain is 60 per cent today diminishing to near zero by tonight. Friday - Partly cloudy and cooler, high in the mid 50s.

Maryland and Virginia: Today - Clearing, breezy and cooler, high near 60, low in the 30s. Friday - Partly cloudy, breezy and cooler, highs from the 40s to the mid 50s.

West Virginia: Today - Lingering showers followed by partial clearing, highs will range from the mid 40s to mid 50s, lows from the mid 20s to mid 30s. Friday - Considerable cloudiness chance of snow flurries, high in the 40s.

Extended Area Forecast for Saturday through Monday - Fair through the period. Temperatures will become gradually warmer through the period with highs ranging from the 50s to low 60s, with lows near 40. Normal Washington temperatures for the period are a high of 55 and a low of 37.

Lower Potomac and Chesapeake Bay - Occasional rain with partial clearing by nightfall. Winds will be from the south increasing to 30 konts by afternoon. Waves will average near 4 feet. A small craft advisory may be required during the night. Visibility will be 5 miles diminishing to less than 1 mile in precipitation.

The National Weather Forecast for today - Snow will fall over much of the mountains in the Pacific Northwest. It will become rain along the northern third of the Pacific Coast. Rain and showers are expected from the central Great Lakes through New England, across the Appalachians and Atlantic Coast and into Georgia. Temperatures will be mild across New England and along the Atlantic Coast as well as along the Gulf of Mexico Coast from Florida through the Louisiana Delta. It will also be mild from central Texas across the southern Calif of the California Coast. Elsewhere, temperatures over the nation will be generally cool.

ALMANAC DATA FOR TODAY: Sun rises 6:52 a.m., sets 4:54 p.m.; Moon rises 11:50 a.m. sets 10:48 p.m. Tides: High 11:57 a.m., low 6:26 a.m. and 6:46 p.m. High and low tides at the following locations can be obtained by subtracting the hours indicated from the tides above. Annapolis (1 1/2); Bloody Point Lighthouse (4 1/2); Deale, Md. (4 1/2); Colonial Beach (6); Norfolk (1 1/2); Virginia Beach (1); Solomons Island (6 1/2); Point Lookout (7).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 27 for the pollutant, phonochemical oxidants. Index values between 25 and 49 indicate fair air quality. When the index exceeds 100 the air is considered very unhealthy and individuals with lung, heart and eye ailments are urged to restrict their activity. The forecast for today indicates that the air quality will improve.

The National Weather Service forecasts the Potomac River stage at Little Falls should fall to near 4.0 feet today.

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 70 degrees at 2:25 p.m. Lowest temperature since midnight, 45 degrees at 6:10 a.m. Excess of temperature since Nov. 1, 110 degrees. Excess of temperature since Jan. 1, 533 degrees. Record high temperature for today, 77 degrees in 1896. Record low temperature for today, 17 degrees in 1933. Relative humidity: Maximum, 40 per cent at 6 a.m.; Minimum, 40 per cent at 7 a.m. 24 hour precipitation, none. Excess of precipitation since Nov. 1, 72 inches. Deficiency of precipitation since Jan. 1, 556 inches. Highest observed wind since 7 a.m. 17 miles per hour from the southwest at 1 p.m. Peak gust since 7 a.m., 23 miles per hour from the southwest at 12:49 p.m. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)53(COLUMN)48 1 a.m.(COLUMN)52(COLUMN)45 2 a.m.(COLUMN)50(COLUMN)54 3 a.m.(COLUMN)49(COLUMN)56 4 a.m.(COLUMN)49(COLUMN)52 5 a.m.(COLUMN)47(COLUMN)56 6 a.m.(COLUMN)46(COLUMN)63 7 a.m.(COLUMN)46(COLUMN)60 8 a.m.(COLUMN)49(COLUMN)56 9 a.m.(COLUMN)52(COLUMN)54 10 a.m.(COLUMN)55(COLUMN)51 11 a.m.(COLUMN)59(COLUMN)34 12 noon(COLUMN)63(COLUMN)35 1 p.m.(COLUMN)66(COLUMN)33 2 p.m.(COLUMN)68(COLUMN)32 3 p.m.(COLUMN)65(COLUMN)38 4 p.m.(COLUMN)63(COLUMN)48 5 p.m.(COLUMN)61(COLUMN)54 6 p.m.(COLUMN)60(COLUMN)62 7 p.m.(COLUMN)62(COLUMN)56(END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)48(COLUMN)46 Albuquerque(COLUMN)65(COLUMN)36 Amarillo(COLUMN)67(COLUMN)35 Anchorage(COLUMN)18(COLUMN)14 Asheville(COLUMN)61(COLUMN)38 Atlanta(COLUMN)63(COLUMN)45 Atlantic City(COLUMN)54(COLUMN)52 Austin(COLUMN)80(COLUMN)63 Baltimore(COLUMN)60(COLUMN)39 Billings(COLUMN)44(COLUMN)34 Birmingham(COLUMN)62(COLUMN)56 Bismarck(COLUMN)45(COLUMN)24 Bolse(COLUMN)61(COLUMN)33 Boston(COLUMN)51(COLUMN)45 Brownsville(COLUMN)78(COLUMN)68 Buffalo(COLUMN)52(COLUMN)46 Burlington, Vt.(COLUMN)45(COLUMN)38 Casper(COLUMN)53(COLUMN)26 Charleston, S.C.(COLUMN)64(COLUMN)55 Charleston, W.V(COLUMN)63(COLUMN)51 Charlotte(COLUMN)63(COLUMN)43 Cheyenne(COLUMN)53(COLUMN)32 Chicago(COLUMN)61(COLUMN)44 Cincinnati(COLUMN)62(COLUMN)52 Cleveland(COLUMN)54(COLUMN)50 Columbia, S.C.(COLUMN)67(COLUMN)41 Columbus(COLUMN)56(COLUMN)49 Dal. Ft. Worth(COLUMN)77(COLUMN)54 Dayton(COLUMN)55(COLUMN)50 Denver(COLUMN)59(COLUMN)38 Des Moines(COLUMN)60(COLUMN)32 Detroit(COLUMN)52(COLUMN)50 Dututh(COLUMN)37(COLUMN)34 El Paso(COLUMN)71(COLUMN)40 Fairbanks(COLUMN)01(COLUMN)09 Fargo(COLUMN)38(COLUMN)29 Flagstaff(COLUMN)62(COLUMN)21 Great Falls(COLUMN)47(COLUMN)28 Hartford(COLUMN)53(COLUMN)43 Helena(COLUMN)44(COLUMN)34 Honolulu(COLUMN)88(COLUMN)72 Houston(COLUMN)79(COLUMN)68 Indianapolis(COLUMN)58(COLUMN)53 Jackson(COLUMN)75(COLUMN)57 Jacksonville(COLUMN)73(COLUMN)50 Juneau(COLUMN)38(COLUMN)30 Kansas City(COLUMN)60(COLUMN)38 Las Vegas(COLUMN)77(COLUMN)46 Little Rock(COLUMN)69(COLUMN)50 Los Angeles(COLUMN)83(COLUMN)58 Louisville(COLUMN)67(COLUMN)54 Memphis(COLUMN)71(COLUMN)59 Miami Beach(COLUMN)76(COLUMN)74 Midland(COLUMN)79(COLUMN)43 Milwaukee(COLUMN)56(COLUMN)37 Mpls. St. Paul(COLUMN)43(COLUMN)30 Nashville(COLUMN)65(COLUMN)57 new Orleans(COLUMN)75(COLUMN)57 New York(COLUMN)54(COLUMN)46 Norfolk(COLUMN)65(COLUMN)46 North Platte(COLUMN)52(COLUMN)30 Oklahoma City(COLUMN)73(COLUMN)45 Omaha(COLUMN)55(COLUMN)37 Orlando(COLUMN)80(COLUMN)57 Philadelphia(COLUMN)56(COLUMN)39 Phoenix(COLUMN)80(COLUMN)54 Pittsburgh(COLUMN)59(COLUMN)48 Portland, Me.(COLUMN)38(COLUMN)29 Portland, Or.(COLUMN)57(COLUMN)45 Providence(COLUMN)51(COLUMN)43 Raleigh(COLUMN)64(COLUMN)43 Rapid City(COLUMN)47(COLUMN)30 Rano(COLUMN)64(COLUMN)23 Richmond(COLUMN)68(COLUMN)42 St. Louis(COLUMN)66(COLUMN)48 St. Prbs.-Tampa(COLUMN)78(COLUMN)58 Salt Lake City(COLUMN)62(COLUMN)42 San Antonio(COLUMN)79(COLUMN)60 San Diego(COLUMN)79(COLUMN)56 San Francisco(COLUMN)70(COLUMN)55 San Juan(COLUMN)87(COLUMN)76 St. Sta. Marie(COLUMN)43(COLUMN)36 Seattle(COLUMN)53(COLUMN)42 Shreveport(COLUMN)75(COLUMN)63 Sioux Falls(COLUMN)46(COLUMN)27 Spokane(COLUMN)46(COLUMN)31 Syracuse(COLUMN)55(COLUMN)47 Topeka(COLUMN)61(COLUMN)34 Tuckson(COLUMN)77(COLUMN)48 TUisa(COLUMN)69(COLUMN)46 Washington(COLUMN)58(COLUMN)45 Wichita(COLUMN)61(COLUMN)36(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37 Amsterdam(COLUMN)hall(COLUMN)1 p.m.(COLUMN)43 Ankara(COLUMN)pt. cldy.(COLUMN)3 p.m.(COLUMN)63 Athens(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)68 Auckland(COLUMN)clear(COLUMN)mid.(COLUMN)50 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Brussels(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)66 Cppenhagen(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)41 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37 Geneva(COLUMN)pt. cldy.(COLUMN)41 Hong Kong(COLUMN)clear(COLUMN)8 p.m.(COLUMN)66 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)61 London(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)45 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)59 Malta(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)70 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)52 Moscow(COLUMN)clear(COLUMN)3 p.m.(COLUMN)45 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)75 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)61 Oslo(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)37 Paris(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)46 Perking(COLUMN)fog(COLUMN)8 p.m.(COLUMN)43 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)66 Saigon(COLUMN)cloudy(COLUMN)6 p.m.(COLUMN)82 Sofia(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)66 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37 Sydney(COLUMN)pt. cldy.(COLUMN)10 p.m.(COLUMN)66 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)75 Tokyo(COLUMN)rain(COLUMN)9 p.m.(COLUMN)55 Tunis(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)68 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Warsaw(COLUMN)clear(COLUMN)1 p.m.(COLUMN)45(END TABLE)